Double storage rack



FIG. 1 is a front perspective view of my new design for a double storage rack;

FIG. 2 is a front elevation view thereof, the rear elevation view being the same;

FIG. 3 is a right side elevation view thereof; the left side elevation view being the same;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

CLAIM The ornamental design for a double storage rack, as illustrated and described. 